Valve controlled sealed lead-acid batteries are classified into two categories: one is the lean liquid type, which is a cathode absorption type ultrafine fiber diaphragm battery. Batteries from domestic battery factories such as Huada, Nandu, and Shuangdeng, as well as batteries from imported Japanese companies such as Tangshen and American GNB, belong to this category; The other type is colloidal batteries, including batteries from Shenyang Northeast Battery Factory in China and imported German solar batteries from abroad&Nbsp; The principle and structure of both types of valve regulated sealed lead-acid batteries are based on the original lead-acid battery, and measures are taken to promote the cycling and recombination of oxygen and suppress the generation of hydrogen. Any generation of oxygen can be considered as a loss of water. If excessive water loss occurs, the battery will dry up and fail, leading to an increase in internal resistance and a loss of battery capacity. Characteristics: Valve controlled batteries have the following characteristics: (1) there is no need to add water during maintenance work; (2) Excellent high current discharge performance, especially excellent impulse discharge performance; (3) The self discharge current is small, with a monthly self discharge rate of less than 2% at 25 ℃, which is about 1/5-1/4 of other lead-acid batteries; (4) No liquid leakage, no acid mist, no corrosion of equipment, no harm to people, and no pollution to the environment; (5) The battery has a long lifespan and can be used in a floating charge state at 25 ℃, with a lifespan of 10-15 years; (6) Compact structure, good sealing performance, can be installed in the same room as the equipment, can be installed vertically or horizontally, occupies a small area, and has good seismic performance; (7) There is no memory effect of cadmium nickel batteries&Nbsp; Valve controlled sealed lead-acid batteries have stable, reliable performance, and low maintenance workload, making them popular among design and operation personnel. However, valve controlled sealed lead-acid batteries are sensitive to temperature and do not allow overcharging or undercharging. They have strict requirements for charging and discharging, and require charging devices with good performance. Improper use and maintenance will seriously shorten the service life of the battery&Nbsp
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